Excessively long warm ups

Anyone else get a bit frustrated by this? Right now I can only really afford to do a couple of sessions of training a week, and it is sooo frustrating when the instructor decides to spend half the class doing solo exercises I could have done by myself at home. Arghh I want to do technique and sparing in that precious mat time, I already did my allotted running for this week.

Having said that it would not be a problem if one knows in advance what the session will be in advance. If its going to be more of a cardio workout session then say so on the timetable, or tell me in advance and I can plan my week's training. Just occasionally the masochist in me does enjoy a session with a fitness nazi. Just dont change the focus of the class on a whim.

10-15 is about right for a warm up yup. I guess its when it goes beyond the half an hour mark and it stops being a warm up, and becomes more of an aerobic fitness work out. And I am not against these as such, its just irritating when I was expecting and planning for a jiujitsu class.

Personally I don't have a problem with long warm-ups, however anything over 30 mins is too much. I think 15mins getting your heart rate up/stretching nd then another 10-15mins of drills (shrimping or active partner drills) is fine. Doing 30mins worth of burpess, press-ups, crunches, squats is not something that should be done every session but is good to do once in a while.

That said a long warm-up can only help with your cardio( the greatest weapon of them all).

Not a fan of big warm-ups but whenever I turn up late and miss warm up I usually tweek something so it is a necessity. 15-20mins max.
Depends how long your class is.
In a 1.5 hr clas, 20-25 mins would not be that bad, but 40mins would be
taking away from technical time and sparring.
Mind you we always have open mat at the end and most stay for an extra
30-40mins sparring, so most classes I attend end up being 2hrs or more.

"Doing 30mins worth of burpess, press-ups, crunches, squats is not something that should be done every session but is good to do once in a while."

Yup. But I would ideally like to know WHICH sessions in advance. Back in the days when I was training seriously, including doing lots of weight training, I really did not wanna do a hundred press after I had already benchpressed myself to death that afternoon.

Yeah these days I am middle aged and getting fatter and caring ever less. Luckily fat can still be used as a weapon squishing the annoying little midgets that show off with fancy flips and shit in the warmups.